You want to do an email campaign. You need to know what works and what doesn't in email these days. Email is not the web. It's worse.
A good tool to use for managing your Email Marketing, and actually your entire Customer/Constituent Relationships is [[CiviCRM]]. Marissa Porter of Arete Imagine (now Wanna Pixel) created [https://civicrm.org/blogs/marisaporter/were-bringing-new-responsive-email-templates-civicrm responsive email templates for CiviCRM] (The templates are included with CiviMail [https://raw.githubusercontent.com/civicrm/civicrm-core/master/xml/templates/message_templates/sample/Sample%20Responsive%20Design%20Newsletter%20-%20Single%20Column.tpl view single column])
But you still need help.